Electric heater for liquids.



N0. 740,240. PATENTBD SEPT. 29; 1903.

' Pt 0. GONILL.

ELEOTRIG HEATER FOR LIQUIDS.

APPLICATION FILED APR. 9, 190a.

11o MODEL.

WITNESSES IN vex/r09 jZr/zm 0. (27217] ATTOHNE rs.

its. 740,240.

UNITED STATES EPatented September 29, 1905 3.

FERNAN O. CONIIJIJ, OF ROXBURY, MASSACHUSETTS.

ELECTRIC H EATER FOR LIQUIDS.

$EECIFICATION forming part of Letters Patent No. 740,240, dated September 29, 1903.

Application filed April 9, 1903. Serial No. 151,751. (No model.)

To aZl whom it may concern:

Be it known that I, FERNAN O. CONILL, a citizen of the Republic of Cuba, and a resident of Roxbury, in the county of Suffolk and State of Massachusetts, have invented a new and Improved Electric Heater for Liquids, of which the following is a full, clear, and exact description.

My invention relates to electric heaters for liquids and the like, and more particularly to a small heater which is readily manipulated by hand.

. Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a perspective view showing my heater ready for use. Fig. 2 is a central vertical section through the same, and Fig. 3 is a fragmentary elevation of theinsulating-cylinder upon which the heating-wire is wound.

A handle 1, of insulating material, is provided with a central hole 2 and with a metallic head 3, of substantially frusto-conical form and having an annular portion 4. A tube 5, of metal, is threaded at its ends 6 7, the end 6 being screwed into the annular portion 4, and into the end 7 is screwed a threaded plug 8, as shown more particularly in Fig. 2. Mounted centrally within the tube 5 is a core 9, of insulating material, capable of withstanding considerable heat. This core is preferably made of porcelain. A spiral thread 9 is cut, preferably on an engine-lathe, by means of a diamond or quartz point. Wound within this thread is a small platinum wire 10, as indicated in Fig. 2, one end of the wire 10 being secured within an aperture 11 in the plug 8 by means of a screw 12. A thin shell 13, of insulating material, may be mounted within the head 3. The other end of the heat ing-wire 10 is wound into a spiral 15 and con: nected, preferably by soldering, with a covered wire 16, constituting one member of a double lamp-cord. The other covered wire 17 of the lamp-cord is connected with a screw 14; in the head 3, and is thus in electrical communication with the head 3 and cylinder 5. The cylinder 5 may be fluted, as indicated in Fig. 1, for the purpose of increasing the radiating-surface thereof.

My invention is used as follows: The operator grasps the handle 1 and submerges the lower portion of the heater, including the tube 5, beneath the surface of a liquid to be heated. The conducting-cords 16 17 having been previously connected with a lamp-socket or with the terminals of a source of electricity the wire 10 becomes intenselyheated, and thereby radiates heat to the cylinder 5, which in turn gives it up to the liquid to be heated.

I find that by the apparatus above de scribed the time necessary to raise half a pint of water from 0 centigrade to the boiling-point is only four or five minutes.

The heater can be cheaply constructed and consists of only a few'parts. These parts are not liable to get out of order. Practically no danger attends the use of the heater, and it may be manipulated by any person of 0rdinaryintelligence. The several parts are fitted together air-tight, and the cylinder 9 is supported by the plug 8, as indicated in Fig. 2.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 7 1. In an electric heater for liquids and the like, the combination of a handle of insulating material, a metallic head mounted thereon and provided with a screw-thread, a tubular member provided with a screw-thread and engaging said head, a plug secured upon said tubular member and closing the same, a cylindrical member of porcelain mounted within said plug and supported thereby, and out of contact with said tubular member, said cylindrical member of porcelain being provided exteriorly with a spiral groove, a platinu m wire mounted spirally within said groove, and screw connections for placing the ends of said wire in communication with a source of electricity.

2. In an electric heater for liquids and the like, the combination of a cylinder of porcelain provided with a spiral thread cut into the exterior surface thereof, a wire of high resistance wound within said thread whereby the separate loops of the wire are accurately aperture with which said metallic member is provided, said end of said wire being engaged by said screw connection, and means for connecting the other end of said Wire and for connecting said tubular member with a source of electricity.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FERNAN O. CONILL.

Witnesses:

PIERRE P. DEMERS, ELIZABETH L. P. FORBES, 

